Python Django manage.py测试:&x201C;数据库后端不接受0作为自动字段”;(mysql)
我正在尝试使用以下命令运行Django测试文件:Python Django manage.py测试:&x201C;数据库后端不接受0作为自动字段”;(mysql),python,django,django-testing,django-migrations,django-tests,Python,Django,Django Testing,Django Migrations,Django Tests,我正在尝试使用以下命令运行Django测试文件: python3.6 manage.py测试 我使用:MySQL 5.5.62,Python 3.6,Django 2.0.0 它开始安装测试数据库并失败,错误如下: ValueError: The database backend does not accept 0 as a value for AutoField. 我搜索了此错误,但找到的所有主题都与迁移相关,例如。我对迁移没有问题,它们运行平稳 回溯: Traceback (most re
python3.6 manage.py测试
我使用:MySQL 5.5.62,Python 3.6,Django 2.0.0
它开始安装测试数据库并失败,错误如下:
ValueError: The database backend does not accept 0 as a value for AutoField.
我搜索了此错误,但找到的所有主题都与迁移相关,例如。我对迁移没有问题,它们运行平稳
回溯:
Traceback (most recent call last):
File "manage.py", line 15, in <module>
execute_from_command_line(sys.argv)
File "/usr/local/lib/python3.6/site-packages/django/core/management/__init__.py", line 371, in execute_from_command_line
utility.execute()
File "/usr/local/lib/python3.6/site-packages/django/core/management/__init__.py", line 365, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)
File "/usr/local/lib/python3.6/site-packages/django/core/management/commands/test.py", line 26, in run_from_argv
super().run_from_argv(argv)
File "/usr/local/lib/python3.6/site-packages/django/core/management/base.py", line 288, in run_from_argv
self.execute(*args, **cmd_options)
File "/usr/local/lib/python3.6/site-packages/django/core/management/base.py", line 335, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python3.6/site-packages/django/core/management/commands/test.py", line 59, in handle
failures = test_runner.run_tests(test_labels)
File "/usr/local/lib/python3.6/site-packages/django/test/runner.py", line 601, in run_tests
old_config = self.setup_databases()
File "/usr/local/lib/python3.6/site-packages/django/test/runner.py", line 548, in setup_databases
self.parallel, **kwargs
File "/usr/local/lib/python3.6/site-packages/django/test/utils.py", line 176, in setup_databases
serialize=connection.settings_dict.get('TEST', {}).get('SERIALIZE', True),
File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/creation.py", line 68, in create_test_db
run_syncdb=True,
File "/usr/local/lib/python3.6/site-packages/django/core/management/__init__.py", line 141, in call_command
return command.execute(*args, **defaults)
File "/usr/local/lib/python3.6/site-packages/django/core/management/base.py", line 335, in execute
output = self.handle(*args, **options)
File "/usr/local/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 200, in handle
fake_initial=fake_initial,
File "/usr/local/lib/python3.6/site-packages/django/db/migrations/executor.py", line 117, in migrate
state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial)
File "/usr/local/lib/python3.6/site-packages/django/db/migrations/executor.py", line 147, in _migrate_all_forwards
state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial)
File "/usr/local/lib/python3.6/site-packages/django/db/migrations/executor.py", line 244, in apply_migration
state = migration.apply(state, schema_editor)
File "/usr/local/lib/python3.6/site-packages/django/db/migrations/migration.py", line 122, in apply
operation.database_forwards(self.app_label, schema_editor, old_state, project_state)
File "/usr/local/lib/python3.6/site-packages/django/db/migrations/operations/fields.py", line 216, in database_forwards
schema_editor.alter_field(from_model, from_field, to_field)
File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 509, in alter_field
old_db_params, new_db_params, strict)
File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 613, in _alter_field
old_default = self.effective_default(old_field)
File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/schema.py", line 224, in effective_default
default = field.get_db_prep_save(default, self.connection)
File "/usr/local/lib/python3.6/site-packages/django/db/models/fields/related.py", line 936, in get_db_prep_save
return self.target_field.get_db_prep_save(value, connection=connection)
File "/usr/local/lib/python3.6/site-packages/django/db/models/fields/__init__.py", line 767, in get_db_prep_save
return self.get_db_prep_value(value, connection=connection, prepared=False)
File "/usr/local/lib/python3.6/site-packages/django/db/models/fields/__init__.py", line 940, in get_db_prep_value
value = connection.ops.validate_autopk_value(value)
File "/usr/local/lib/python3.6/site-packages/django/db/backends/mysql/operations.py", line 163, in validate_autopk_value
raise ValueError('The database backend does not accept 0 as a '
ValueError: The database backend does not accept 0 as a value for AutoField.
回溯(最近一次呼叫最后一次):
文件“manage.py”,第15行,在
从命令行(sys.argv)执行命令
文件“/usr/local/lib/python3.6/site packages/django/core/management/__init__uuuu.py”,第371行,从命令行执行
utility.execute()
文件“/usr/local/lib/python3.6/site packages/django/core/management/__init__.py”,执行中的第365行
self.fetch_命令(子命令)。从_argv(self.argv)运行_
文件“/usr/local/lib/python3.6/site packages/django/core/management/commands/test.py”,第26行,在运行时从_argv
super()。从_argv(argv)运行_
文件“/usr/local/lib/python3.6/site packages/django/core/management/base.py”,第288行,在运行中,从
self.execute(*args,**cmd_选项)
文件“/usr/local/lib/python3.6/site packages/django/core/management/base.py”,第335行,在execute中
输出=self.handle(*args,**选项)
文件“/usr/local/lib/python3.6/site packages/django/core/management/commands/test.py”,第59行,在handle中
失败=测试运行程序。运行测试(测试标签)
文件“/usr/local/lib/python3.6/site packages/django/test/runner.py”,第601行,运行测试中
old\u config=self.setup\u databases()
setup_数据库中的文件“/usr/local/lib/python3.6/site packages/django/test/runner.py”,第548行
self.parallel,**kwargs
setup_数据库中的文件“/usr/local/lib/python3.6/site packages/django/test/utils.py”,第176行
serialize=connection.settings\u dict.get('TEST',{}).get('serialize',True),
文件“/usr/local/lib/python3.6/site packages/django/db/backends/base/creation.py”,第68行,在create\u test\u db中
运行\u syncdb=True,
文件“/usr/local/lib/python3.6/site packages/django/core/management/_init__.py”,第141行,在call_命令中
return命令。execute(*args,**默认值)
文件“/usr/local/lib/python3.6/site packages/django/core/management/base.py”,第335行,在execute中
输出=self.handle(*args,**选项)
handle中的文件“/usr/local/lib/python3.6/site packages/django/core/management/commands/migrate.py”,第200行
假首字母=假首字母,
文件“/usr/local/lib/python3.6/site packages/django/db/migrations/executor.py”,migrate中的第117行
状态=self.\u迁移\u所有\u转发(状态,计划,完整计划,假=假,假首字母=假首字母)
文件“/usr/local/lib/python3.6/site packages/django/db/migrations/executor.py”,第147行,全部向前迁移
state=self.apply\u迁移(state,migration,false=false,false\u initial=false\u initial)
文件“/usr/local/lib/python3.6/site packages/django/db/migrations/executor.py”,第244行,在apply_migration中
state=migration.apply(状态,模式编辑器)
文件“/usr/local/lib/python3.6/site packages/django/db/migrations/migration.py”,第122行,在apply中
操作。数据库转发(self.app\u标签、模式编辑器、旧状态、项目状态)
数据库中的文件“/usr/local/lib/python3.6/site packages/django/db/migrations/operations/fields.py”,第216行
schema_editor.alter_字段(从_模型、从_字段到_字段)
文件“/usr/local/lib/python3.6/site packages/django/db/backends/base/schema.py”,第509行,在alter_字段中
旧参数,新参数,严格)
文件“/usr/local/lib/python3.6/site packages/django/db/backends/base/schema.py”,第613行,在_alter_字段中
旧默认值=自生效默认值(旧字段)
文件“/usr/local/lib/python3.6/site packages/django/db/backends/base/schema.py”,第224行,默认有效
默认值=field.get\u db\u prep\u save(默认值,self.connection)
文件“/usr/local/lib/python3.6/site packages/django/db/models/fields/related.py”,第936行,在get_db_prep_save中
返回self.target\u字段。get\u db\u prep\u save(值,连接=连接)
文件“/usr/local/lib/python3.6/site packages/django/db/models/fields/_init__.py”,第767行,在get_db_prep_save中
返回self.get_db_prep_值(值,connection=connection,prepared=False)
文件“/usr/local/lib/python3.6/site packages/django/db/models/fields/_init__.py”,第940行,在get_db_prep_值中
value=connection.ops.validate\u autopk\u值(value)
文件“/usr/local/lib/python3.6/site packages/django/db/backends/mysql/operations.py”,第163行,在validate_autopk_值中
raise VALUERROR('数据库后端不接受0作为'
ValueError:数据库后端不接受0作为AutoField的值。
如何修复此错误并运行测试?好的,似乎确实是建议的迁移。我最终删除了迁移,解决了问题
可能值得指出的是,造成混乱的原因是从Django模型切换到Django MTPP模型,并使用
0
作为新添加的MTPP字段的默认值,以避免在该过程中出现另一个问题。好的,似乎确实是建议的迁移。我最终删除了迁移,并解决了问题。
可能值得指出的是,造成混乱的原因是从Django模型切换到Django MTPP模型,并使用
0
作为新添加的MTPP字段的默认值,以避免该过程中出现另一个问题。根据回溯,这种情况确实发生在迁移过程中:测试数据库的迁移。@WillemVanOnsem谢谢,这确实是真的,但是我能对测试迁移做些什么呢?迁移文件夹中没有迁移文件。看看这个:@MahrezBenHamad谢谢,我在发布之前已经看过了,但是我花了一段时间才意识到这些是迁移问题的原因